fix(docs): replace underscore with dash for dev-dependencies (#6344)
Docs show an underscore which should be a dash in dev-dependencies:
`dev_dependencies = ["ruff==0.5.0"]`
## Summary
I followed the example in the references settings and used
dev_dependencies in my pyproject.toml but it seems like this needs to be
a dash instead of an underscore:
=> ERROR [stage-0 5/5] RUN uv sync 6.9s
------
> [stage-0 5/5] RUN uv sync:
0.085 warning: Failed to parse `pyproject.toml` during settings
discovery:
0.085 TOML parse error at line 65, column 1
0.085 |
0.085 65 | [tool.uv]
0.085 | ^^^^^^^^^
0.085 unknown field `dev_dependencies`
0.085
